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Earnings (Loss) Per Share (Tables)
 3 Months Ended
Mar. 31, 2013
Earnings Per Share [Abstract]  
Computations of basic and diluted loss per share for Loss from Continuing Operations
The computations of basic and diluted earnings per share for Net Income (Loss) were as follows (in millions, except per share data):
 
 
For the Three Months Ended March 31,
 
2013
 
2012
Net income (loss)
$
8.0

 
$
(6.1
)
Add: Loss from discontinued operations
7.8

 
15.4

Income from continuing operations
$
15.8

 
$
9.3

 
 
 
 
Weighted-average shares outstanding – basic
50.3

 
50.9

Effect of diluted securities attributable to stock-based payments
0.7

 
—

Weighted-average shares outstanding – diluted
51.0

 
50.9

 
 
 
 
Earnings per share – Basic:
 
 
 
Income from continuing operations
$
0.32

 
$
0.18

Loss from discontinued operations
(0.16
)
 
(0.30
)
Net income (loss)
$
0.16

 
$
(0.12
)
 
 
 
 
Earnings per share – Diluted:
 
 
 
Income from continuing operations
$
0.31

 
$
0.18

Loss from discontinued operations
(0.15
)
 
(0.30
)
Net income (loss)
$
0.16

 
$
(0.12
)
Stock appreciation rights were outstanding, but not included in the diluted loss per share calculation
stock appreciation rights were outstanding but not included in the diluted earnings per share calculation because the assumed exercise of such rights would have been anti-dilutive (in millions, except for per share data):
 
 
For the Three Months Ended March 31,
 
2013
 
2012
Weighted-average number of shares
0.4

 
1.1

Price ranges per share
$51.11 - $51.40

 
$34.06 - $46.78